A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat can be forced to recurse indefinitely, exhausting the stack space and causing a crash. This issue could lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the environment and library usage.
https://ubuntu.com/security/CVE-2024-8176
https://security-tracker.debian.org/tracker/CVE-2024-8176
https://gitlab.alpinelinux.org/alpine/aports/-/commit/d068c3ff36fc6f4789988a09c69b434db757db53
https://github.com/libexpat/libexpat/issues/893
https://github.com/libexpat/libexpat/blob/R_2_7_0/expat/Changes#L40-L52
https://bugzilla.suse.com/show_bug.cgi?id=1239618
https://bugzilla.redhat.com/show_bug.cgi?id=2310137
https://blog.hartwork.org/posts/expat-2-7-0-released/